Prof. David Yuen [University of Minnesota, USA & 太观技术, China]

Title: A Challenging Geodynamical and Geochemical Scenario: The Injection of Water into bottom of Lower Mantle

Time: 11:00 - 12:00 PM, Thursday, January 18, 2018

Place: Conference room 410, HPSTAR (Shanghai)

Host: Ho-Kwang Mao

Abstract:

Recent  enthralling findings  by the HPSTAR group  have  indeed  raised  the prospects  of  abundance of  water existing  in the deep mantle. The impact  from hydrous  phase at the base of  the mantle is profound and  has  wide_ranging consequences on the Earth, s  surface in  the form of  global -scale instabilities . Today  I will lead a discussion focusing  on   the need for more calculations and  experiments  for obtaining estimates of  physical properties in  the multi-phase  aggregates . In  particular, we should  aim to  put estimates on  the viscosity at  different  scales and  various  phases  in  order to  understand  better the possibilities of  mechanisms , such as  multi-scale  Rayleigh-Taylor  instabilities involving  multi_phase , multi species under temperature and  high pressure  conditions

Biography of the Speaker:





Prof. David Yuen graduated in 1969 from Caltech in chemistry. He then received a master in physical chemistry from UC Berkeley and a PHD in geophysics and geophysics in 1978 with a minor in applied mathematics from UCLA Following a two year NATO and NSF postdoctoral fellowships, he went to Arizona State University as assistant professor in geology. In 1985 he moved two times, first to Dept. of Geological Sciences at university of Colorado at Boulder in January as associate professor, then in September to University of Minnesota, as associate professor in geophysics and Fellow of Minnesota Supercomputer Institute. Since 2012, he has been spending 3 to 4 months each year at the School of Environmental Studies at 中国地质大学武汉 as a 长江 professor. He works mainly in computational geodynamics with interests also spanning to visualization and now Big Data大数据. He has published around 550 papers and edited six books in geophysics and high-performance computing. His h-index is 61 according to Thomas-Reuters.